Mapping phenology of natural vegetation in India using remote sensing derived chlorophyll index

Jeganathan, C. and Dash, J. and Atkinson, Peter M. (2010) Mapping phenology of natural vegetation in India using remote sensing derived chlorophyll index. International Journal of Remote Sensing, 31 (22). pp. 5777-5796. ISSN 0143-1161

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Abstract

Time series of MEdium Resolution Imaging Spectrometer (MERIS) Terrestrial Chlorophyll Index (MTCI) level-3 data product, with a spatial resolution of ∼4.6 km composited at 8-day intervals for the years 2003 to 2007, were used to map the phenology of natural vegetation in India. Initial dropouts and noise in the MTCI data were corrected using a temporal moving window filter, Fourier-based smoothing using the first four harmonics was applied and then the phenological variables were extracted through a temporal iterative search of peaks and valleys in the time series for each pixel. The approach was fine-tuned to extract reliable phenological variables from the complex and multiple phenology cycles. A global land cover map (GLC2000) was used as a reference to extract the spatial locations of the vegetation types to infer their phenology. The median of each phenological variable was derived and a spatial majority filter was applied to the 1° × 1° grids (representing 1:250 000 Survey of India toposheet) covering the whole of India. This study presents the results derived for the evergreen, semi-evergreen, moist deciduous and dry deciduous vegetation types of India. A general trend of earlier onset of greenness at lower latitudes than at higher latitudes was observed for the natural vegetation in India.

Item Type:
Journal Article
Journal or Publication Title:
International Journal of Remote Sensing
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/1900
Subjects:
ID Code:
77218
Deposited By:
Deposited On:
18 Dec 2015 11:44
Refereed?:
Yes
Published?:
Published
Last Modified:
01 Apr 2020 04:18